A quantum thermometric sensing and analysis system using fluorescent nanodiamonds for the evaluation of living stem cell functions according to intracellular temperature

Hiroshi Yukawa, Masazumi Fujiwara, Kaori Kobayashi, Yuka Kumon, Kazu Miyaji, Yushi Nishimura, Keisuke Oshimi, Yumi Umehara, Yoshio Teki, Takayuki Iwasaki, Mutsuko Hatano, Hideki Hashimoto, Yoshinobu Baba

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Intracellular thermometry techniques play an important role in elucidating the relationship between the intracellular temperature and stem cell functions. However, there have been few reports on thermometry techniques that can detect the intracellular temperature of cells during several days of incubation. In this study, we developed a novel quantum thermometric sensing and analysis system (QTAS) using fluorescent nanodiamonds (FNDs). FNDs could label adipose tissue-derived stem cells (ASCs) at high efficiency with 24 h of incubation, and no cytotoxicity was observed in ASCs labeled with less than 500 μg mL−1of FNDs. The peak of FNDs was confirmed at approximately 2.87 GHz with the characteristic fluorescence spectra of NV centers that could be optically detected (optically detected magnetic resonance [ODMR]). The ODMR peak clearly shifted to the high-frequency side as the temperature decreased and gave a mean temperature dependence of −(77.6 ± 11.0) kHz °C−1, thus the intracellular temperature of living ASCs during several days of culturing could be precisely measured using the QTAS. Moreover, the intracellular temperature was found to influence the production of growth factors and the degree of differentiation into adipocytes and osteocytes. These data suggest that the QTAS can be used to investigate the relationship between intracellular temperature and cellular functions.

Original languageEnglish
Pages (from-to)1859-1868
Number of pages10
JournalNanoscale Advances
Volume2
Issue number5
DOIs
Publication statusPublished - May 2020
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Chemistry(all)

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